Push-button switch.



G. B. THOMAS.

PUSH BUTTON SWITCH.

APPLICATION FILED JUNE 5, 1908.

f A D I WsAWMi-ZH WITNESSES INVENTOK %/f%% 5 5%W 04mm ATTORHE YS which the following is a GEORGE B. 'rnoMAs, OF BRIDGEPORT,

SWITCH MFG. COMPANY, OF BRIDGEPORT TICUT.

CONNECTICUT, ASSIGNOR TO PERKINS ELECTRIC CONNECTICUT, A GQKPOBATION OF CONNEC- PUSH-BUTTON swr'rcn.

No. 907,098. Specification of Letters Patent. Patented Dec. s, 1908.

Application filed June 6, 1908. Serial No. 436,826.

To all whom it may concern:

Be it known that I, GEORGE B. THOMAS, acitizen of the United States of America, residing in the city of Bridgeport, in the county of Fairfield, in the State of Connectiout, have invented certain new and useful Improvements in Push-Button Switches, of

specification.

The object of my invention is to soconstruct an electric switch of the two ush button snap type as to permit of a shalibwer box than usual, and to shorten the extent of movement of the buttons and make their movements straight. This object I attain by the construction hereinafter described.

Inthe accom a vertical section of a two push button switch embodying my invention; Fig. 2 is a perspective view of a portion of the device embodying my invention.

In these'drawings, byway of example, I have shown my invention as applied to a push button snap switch mechanlsm of the construction formin the subject of my Patent 743,348, dated li ovember 3rd, 1903, but it will be understood that my invention may be applied in connection with other suitable constructions of switch mechanism of the two push button type.

A is the insulating box, and across the open top of this is secured in any suitable way the yoke E, towhich is secured the upper end of the the lower end being supported in' any usual way-in the bottom of the insulatin box. At 9 is the axis of the working sWitcIi mechanism supported by the post 10. On this axis is the oscillating operating lever H to be operated by the push buttons and provided with tension sprin S. The rest of the snap switch devices an contacts are not shown and need not be described as they are fully disclosed in my former patent and form no essential art of my present invention.

P and 1 are the two push buttons, guided as usual in the yoke E, but instead of connectingthe stems p, p, of these push buttons directly to the ends of the lever H, I make the latter considerably shorter than heretoanying drawings Figure 1 is upright supporting post 10,

fore, and Iv connect the stems .to v the lever ends through the medium of inks B, B. The distance apart of the pivoting centers 1),

I B, is less than the distance apart of the center lines of the push buttons. The axis 9 is placed much higher in the box than formerly so that I may have these links B, B pendent fromth'e ends of the levers to the ends of the stems of the push buttons. By this, construction I am enabled to use a shallower box, provide a shorter push or stroke of the buttons, and a straight push of the buttons themselves and getan efiicient action on the lever H.

-To further insure a buttons and prevent that binding action on the buttons in the holes in the face plate, so characteristic of the push buttons in most switches of the two button type, I provide in the lower part of the box means for guiding the stems of the push buttons; In the drawings I have shown for this pur ose u rights D, .1) formed out of one strip oPmetal 1 secured in\the bottom of the box A; and on .these guides slide slotted hubs C carried b the lower ends of the stems p, of the push buttons. I prefer to provide t ese'stems p, with shoulders, at, x, to contact push buttons and an oscillating operating lever with connectin links pendent from the ends of said oscillating lever.

2. An electric push switch havin two push buttons and an oscillating operating lever with connecting links endent from the ends of the lever to the en sof the'push button stems and means for guiding the latter instraight lines.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

.. GEORGE B.-THOMAS.

Witnesses:

F. E. SEELEY, A. H. JoNns.

- b, at the ends of the lever H, for connection with the push buttons through the links B,

straight push on the derside of the yoke E and to act as stops.

I claim as my invention 1. An electric push switch havin two with the 1m; 

